Posted by Anonymous on Monday, August 13, 2012 at 8:53pm.
Let be an angle in standard position and the point
(a, b) be the point of intersection of the terminal
side of with the unit circle. State the unit circle
definitions of the six trigonometric functions.
cos = sec =
sin = csc =
tan = cot =

trig  Reiny, Monday, August 13, 2012 at 9:02pm
If Ø is your angle, and since
r=√(a^2 + b^2)
sinØ = b/r
cscØ = r/b
cosØ = a/r
secØ = r/a
tanØ = b/a
cotØ = a/b
These definitions should be in your textbook and are probably defined in terms of x, y and r.
You should memorize them